compiler-rt/test/builtins/Unit/divti3_test.c

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_divti3
   3 // REQUIRES: int128
   4 //===-- divti3_test.c - Test __divti3 -------------------------------------===//
   5 //
   6 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   7 // See https://llvm.org/LICENSE.txt for license information.
   8 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   9 //
  10 //===----------------------------------------------------------------------===//
  11 //
  12 // This file tests __divti3 for the compiler_rt library.
  13 //
  14 //===----------------------------------------------------------------------===//
  15
  16 #include "int_lib.h"
  17 #include <stdio.h>
  18
  19 #ifdef CRT_HAS_128BIT
  20
  21 // Returns: a / b
  22
  23 COMPILER_RT_ABI ti_int __divti3(ti_int a, ti_int b);
  24
  25 int test__divti3(ti_int a, ti_int b, ti_int expected)
  26 {
  27     ti_int x = __divti3(a, b);
  28     if (x != expected)
  29     {
  30         twords at;
  31         at.all = a;
  32         twords bt;
  33         bt.all = b;
  34         twords xt;
  35         xt.all = x;
  36         twords expectedt;
  37         expectedt.all = expected;
  38         printf("error in __divti3: 0x%llX%.16llX / 0x%llX%.16llX = "
  39                "0x%llX%.16llX, expected 0x%llX%.16llX\n",
  40                at.s.high, at.s.low, bt.s.high, bt.s.low, xt.s.high, xt.s.low,
  41                expectedt.s.high, expectedt.s.low);
  42     }
  43     return x != expected;
  44 }
  45
  46 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
  47
  48 #endif
  49
  50 int main()
  51 {
  52 #ifdef CRT_HAS_128BIT
  53     if (test__divti3(0, 1, 0))
  54         return 1;
  55     if (test__divti3(0, -1, 0))
  56         return 1;
  57
  58     if (test__divti3(2, 1, 2))
  59         return 1;
  60     if (test__divti3(2, -1, -2))
  61         return 1;
  62     if (test__divti3(-2, 1, -2))
  63         return 1;
  64     if (test__divti3(-2, -1, 2))
  65         return 1;
  66
  67     if (test__divti3(make_ti(0x8000000000000000LL, 0), 1, make_ti(0x8000000000000000LL, 0)))
  68         return 1;
  69     if (test__divti3(make_ti(0x8000000000000000LL, 0), -1, make_ti(0x8000000000000000LL, 0)))
  70         return 1;
  71     if (test__divti3(make_ti(0x8000000000000000LL, 0), -2, make_ti(0x4000000000000000LL, 0)))
  72         return 1;
  73     if (test__divti3(make_ti(0x8000000000000000LL, 0), 2, make_ti(0xC000000000000000LL, 0)))
  74         return 1;
  75
  76 #else
  77     printf("skipped\n");
  78 #endif
  79     return 0;
  80 }